Improved machine for rolling conical and other tubes



naar j sai-a ritratdtjijirr.

CHARLES mtvvnv, or san-FRANCISCO, cALrroRNIA.

Laim Patent N0.'1o2,13o, ama Apr/iz 19, 1870.'

, l IMPROVE!) MACHINE FOR RQLLING-CONICAL AND OTHER TUBES.

The Schedule referred'to in these Letters Patent and making part of the same.

To all'wliom it may concern Be it known that I, CHARLES KnwIN, vof the city and couutyof San Francisco, State of Galifornia,-have invented an Improved Machine for Rollingl Conical and other Tubes g' and I do hereby declare the following description and accompanying drawings are sufcient to enable any person skilled in the art or science to which it most nearly appertains to make' and use my said invention or .improvements without further invention or experiment.

- My invention relates to fau improved machine for rolling or forming conical tubes or funnelsfrom sheet metal of any kind, and is more particularly useful for forming locomotive smokestacks,` where they are made conical in form; and

It consists of two series' of adjustable rollers, placed at a short distance apart, and a third series, also adjustable, which is placed above them, between the rst two series.

Ihev lower series of rollers' are revolved at different speeds by the friction of a revolving elastic table underneath;

The sheet metal is placed so as toroll under the upper series, and over the two lower, its contactbetween them causing the upper series to roll also, and thus feed the. sheet metal while itgives it .the proper orm.

In order to more fully illustrate and explain my invention, reference is had to the accompanying drawing forming a part of this specication, in whic A A are the two sides of my machine, and B and C two metal' plates secured to them, one above the other,so as to provide two tables.

The entire machine caribe secured to the door, if ntended for large and heavy work, or-upon a table, if intended 'for tinsmiths or light work.

'A turn-table, D, is arranged just under the upper table B, so as to be revolved by the pinion b ou the shaft d, the outer rim ot' the circular table being provided with teeth, so as to engage with the pinion.

The 'upper surface of the turn-table is covered with a rubber or other velastic cushion, E, which isrmly secured to it.

Underneath the turn-table are arranged two Aor more 'pressure-rollers, e c, which can be, elevated or depressed at pleasure', in Aorder to adjust the move'- nent of .the table.

The' upper plate or table B has-fa`- portion cut out from its center, s u'icient to allow' theseries of rollers F and F' to project through and bear upon the upper elastic surface of the circular table D.

These rollers are secured at the ends of the plates G, so as to be revolved by the friction of the elastic surface of .the rotating table D.

opposite end, and transverse slots, f are made through the plateB, at the proper points through which the bolts which secure the plates G pass.'

The plates G may be adj usted to any desired angle -or position by loosening the bolts g, and setting the passing over the rollers may bear the same proportion to the distance of the inner edge from'the `same center that the diameter (or circumference) of the larger end ofthe conical tube to be formed is to bear to that of the smaller end.

The rollers F 'and F shouldr also be adjusted so that the axes in each set may allcorrespond with or lie over the same radius drawn from the center of motion of the table D.

Moreover, to make the machine work to the best advantage, the rollers L should be so graduated that the diameter of the least roller may be to the (1 i-- am'eter of the greatest as the distance 'of the former fromtheenter of motion of D is to the distance of thelatter from the samepoint; but, inA practice, it is not essential that these conditions should be exactly fulfilled.

Two pairs of vertical standards, I and J, are secured to the table, a short distance apart,veach pair being' set so as to leave a small space between themrin a line with the space between the two adjustable se'ries of rollers F and F'.

A bar, K, having a set or seriesl of rollers, L, which gradually lessen iu size toward the outer extremity of the bar, arranged along 'a portion of its length, has its opposite end secured between each pair of the two vertical standards,so that the end 'along which the rollers are arranged will extend across the same width as the rollers F and F', but set so as to stand abov vand between them.

For heavy work the standard -I should stand at the end J of thetable, so as to support the extreme end of-.tbe bar l? or of' the double-ended bar S, fig. 3, which may be' substituted for the bar` K.

The bar K is adjustable by means of screws N,

'which are Asecured to it between the standards, and

extend upward throughthe. cross-barat the top, having a nut above and `below the' cross-bar, by means of which the rollers may be set to vany elevation or pitch required in forming the tubes.

When it is desired\to turnout cylindrical tubes, a solid4 roller or cylinder', T, lfig. 4, can be substituted to revolve.

fory the tapering rollers on the bar K, in which case the plates G will be set so as to bring the series of rollers F F in a line with the roller, andthe pressurerollers are lowered, the table D not being used; but the roller 'l may be turned so as to feed the metal through by means of a crank on its shaft, x.

The sheet metal is tirst cut or stamped into the proper form for rolling into conical tubes. The edge which `is intended-to be inserted between the rollers is then turned, so as to pass under the upper or tapering rollers, and over the rollers F and F. The shaft d is then turned by hand, or other convenient means;

' the pinion b', engaging with the teeth on the periphery of the circular table, causes it to revolve. The pres' sure rollers e e, which bear upon the under side ot' the circular' revolving-table, force it upward, so that the friction of its elastic revolving surface against the series of rollers F and F will cause them to revolve, and thus feed the sheet metal, the intervention and motion of which causes the upper series or tbrming-rollers L The rollers farthest from the central point, around which the circular table revolveamove faster than those nearest the center, thus causing the metal .to assume a conical form, the shape or taper of the conedepending on the adjustment of the series of rollers, and the distance at which rthe table is pilvoted from the rollers. t

By the usel of this machine, locomotive smokestacks can be made with very little trouble, and for tinsmiths use it will be of Vgreat value.

The several sets of rollers may be removed and replaced cr adjusted with great facility, and thus adapted for rolling or forming tubes'of almost every description, the shape of which depends on the radius given to the table l), and the consequent difference in the speed of the rollers, as well as on the position given to the several sets. y

Having thus described myinvention,

lVhat I claim, and desire to secure by Letters Patent, is l 1. The two series of rollers F F', mounted upon the adjustable plates G, in combination with the series of adjustable forming-rollers L, substantially as' and for the purpose above described.

2. The circular revolving-table I),T with its elastic upper surface 'for imparting frictioual pressure for revolving the rollers F F', and its regulating-bar V, substantially' as and for the purpose described.

3. The adjustable pressure-rollers e e, in combination with the revolving friction-table I), substantially as and for the purpose specified.

In witness whereof I have hereunto ,set my hand and seal.

CHARLES KEWIN. [L. s.]

'Witnessesz A. T.' DEWEY, W. R. BOONE. 

